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Once the option is selected, some items in the list are replaced with groups, and an additional table appears in the lower part of the form. This lower table lists the items of the group which is selected in the upper table. For example, in the screenshot below, you can view 2 3 groups of items in the upper panel ("Seats - MY" and "Furniture -MY" from Malaysia and "Seats" from Singapore) and, in the lower table, 2 3 items of group 1 ("SeatsFurniture"), which is selected in the upper table.
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